News & Features

Many parents who light up are aware of the dangers of secondhand smoke; they blow it out the window or smoke at home only when the kids are not there. But people rarely account for what is left behind after a cigarette has been extinguished. When smoke dissipates, it does not just disappear....

The breath of people with lung cancer is different from that of healthy people -- it contains higher concentrations of alkanes and other volatile organic compounds. Researchers have known this for years and have tried to develop breath-sensing systems that could diagnose the disease, as an...